I agree completely. I used to cox the men's 1st VIII at my college and occasionally men's IVs but I would also occasionally help out with the women's blue boat trials when they needed more coxes than were interested in trialling. The men in my crews were decent athletes, a couple rowed for Goldie/LWs/Blue boat but most were just decent college-level rowers. The women in the trial boats were top level female athletes, with great technique close to the peak of their game (obviously those who were selected went on to be even more so). But yes, the difference in power, and speed was palpable. The speed in the water, the ease with which boats were lifted out, the length of stroke. Everything.
I agree too with @PermanentTemporary 's point about it not always feeling like a totally single-sex sport given that there are often different-sex coxes in the crews. That may make it easier for those who want to break down barriers to do so. But our function was different. We were there for our intellectual input and our ability to judge angles.
Saddened to learn about the 2015 crew. Not acceptable at all.
Very relieved to see common sense prevailing - albeit by a disgracefully narrow margin.